This seems to be incorrect - instead AppendDataBoundItems adds new databound items to the existing ones - no matter where the come from.
In other words - if I "autobind" (datasource filtered via Control Parameter) every binding adds it's items to the one in the combobox.
Example: I have a radiobutton array - when I select something there it works as parameter for the datasource of the combobox.
At startup the combo has only the value "select something...". Than I check one of the radiobuttons - and the datasource give "One, Two, Three" - wich results in the following Combobox items:
"select something..."
One
Two
Three
--So far it works as I expected.
Now I check a different radiobutton - my datasource gives "Four, Five" for this selection:
The combo now has:
"select something..."
One
Two
Three
Four
Five

Instead of
"select something..."
Four
Five
--As I would expect.

Is this like it should be?
If so I have to rethink the use of AppenDataboundItems - and go back to datasources with a "dummy record".

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